"Guests were greeted with cocktails before entering the massive space, which was decked out '70s style, complete with sparkling disco balls," a source told Us Weekly of the event hosted by Grey Goose vodka and Vanity Fair. "Cooper posed with fans for photos, and later caught up over dinner [with Waterhouse]."

The two have kept their relationship quiet, but with Cooper and "American Hustle" in the mix for award season, we imagine we'll be seeing a lot more of him and his new girl, even if Waterhouse thinks they're "boring."

"I don't talk about my boyfriend because it's boring," Waterhouse said in Elle UK's January issue. "At least, that's what I decided to tell you when you asked."

"Look, maybe it's best for me to say, 'I'm not one of those girls who goes on about their boyfriends.' I do think whatever I say will sound weird. But the truth is, if I start talking about him, I probably won’t be able to stop. And I don’t really want to talk about him, you know?"